作者:Masato Oikawa、Tomoko Uehara、Taizo Iwayama、Makoto Sasaki
DOI:10.1021/ol0613766
日期:2006.8.1
Here, we report a synthesis of the lower half C21-C40 fragment of the shellfish toxin, azaspiracid-1. The C28-C40 fragment was synthesized by a coupling between the C28-C35 epoxide and the C36-C40 dithioacetal anion, followed by the HI-ring spiroaminal formation. An aldehyde corresponding to the C28-C40 fragment was then coupled with the C21-C27 allylic stannane by using InCl3. Finally, the FG-ring
在这里,我们报告了贝类毒素azaspiracid-1的下半部分C21-C40片段的合成。C28-C40片段是通过C28-C35环氧化物和C36-C40二硫缩醛阴离子之间的偶联反应合成的,然后形成HI环螺环缩醛。然后通过使用InCl 3将对应于C 28 -C 40片段的醛与C 21 -C 27烯丙基锡烷偶联。最后,通过HF。吡啶构建FG环,以完成适当保护的C21-C40片段的合成。